Power grease pump



July 27 1926. 1,594,216

.1 MOE SMITH POWER GREASE PUMP Original Filed Dec. 1, 1924 4 Sheets-Sheet 1- 4 Sheets -Sheet 2 July 27 1926.

J M E. SMITH POWER GREASE PUMP Original Filed gec. 1, 1924 9 rivefitofi attorney July 27, 1926.

J M E. SMITH POWER GREASE PUMP 4 Sheet sSheet 5 N QN i Original Filed Dec. 1

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J M E. SMITH POWER GREASE PUMP Original Filed De 4 Sheets-Sheet 4 k @N ww N i y w Patented July 27, 1926.

UNITED STATES PATENT -OFFlCE J MCELROY SMITH, F COLUMBUS, OHIO.

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Application filed December 1, 1924, Serial No. 753,077. Renewed June 22, 1926.

My present invention relates to dispensing pumps, and more particularly to an improved power operated dispensing lubricant pump.

In the servicing of motor vehicles, one of the most objectionable items is the proper and economical administration of heavy oils or greases to the various parts of the mechanism such as transmission, differential housing, bearings, etc. The diiiiculty is enhanced by the fact that, with regard to bearings, considerable pressure is oftentimes required to force the lubricant therein and no prior means of which ll am aware enables this to be done and yet to provide means which will conserve the lubricant and simultaneously and accurately measure the amount of lubricant used. The inability to do this results in dissatisfaction, both to the service man and to the customer, and my present invention is designed to overcome this dificulty. It is essential that the servicing of a car, in order to be economically performed, be performed in a minimum of time. as only in rare instances can a car be serviced with regard to a time and material basis.

In my present invention I have devised an improved apparatus for automatically dispensing and measuring the heavy oils or other lubricant under pressure and which apparatus will simultaneously measure the amount of lubricantused and which will always be in condition for service. if accomplish this latter desirable result by providmg a plurality of receiving and dispensing receptacles connected or associated together in such a manner that, while one is being used as a dispensing receptacle, the other or others are utilized as receiving receptacles so that, as soon as one receptacle is emptied, the ap aratus is automatically operated to place t e other, and what was formerly the receiving receptacle, into position and condition to act as a dispensing receptacle. For positive and economical operation of the apparatus 1 utilize a hydraulic unit directly connected to the receiving and dispenslng receptacles; and operate such bydraulic unit by means of any convenient source of air power. a

The principal object of my invention, therefore, is an improved power lubricant dis ensing apparatus. nother o ject of my mvention is an ii'n proved combined automatic lubricant dispensing and measuring apparatus.

A further object of my invention is an improved hydraulic operating unit associated with a lubricant dispensing apparatus together with automatic means for trolling the hydraulic unit.

Other objects and novel features of the construction and arrangement of parts comprising my improved apparatus will be apparent as the description of the invention progresses.

In the accompanying drawings illustrating the preferred embodiment of my invention,

Fig. 1 is a front elevation in perspective;

.Fig. 2 is a plan view of the apparatus with the lubricant tank removed;

Fig. 3 is a vertical sectional elevation on the line 3-3 of Fig. 2;

, Fig. 4 is an end elevation;

Fig. 5 is a partial rear: elevation showing the rear of the cont-rolling valve, and

Fig. 6 is a sectional elevation on the line 66 of F 5,

Referring to the drawings", 10 designates uprights arranged parallel with each other and s aced apart appropriate distances, said uprights being arranged in pairs, each pair being connected together at their top by memers ll, as shown, and ending between each pair are longitudinally extending members 12. Braces 13 are employed to stifi'en the frame and prevent relative movement of the parts with respect to each other. Between each pair of uprights l0 and near the bottom thereof extend cross members or bars 14, and extending between the members 14: are longitudinally extending members 15 for supporting the mechanism to be hereinafter described. The upof uprights 10 are members 20 spaced apart from each other and formed ri ht and left handled, as shown in Fig. 3. T e opposing COIl-' faces of the members 20 are provided with annular grooves of approprlate diameter and in which fit the ends of the cylindrical casing or cylinder 21. 'Perfipherally arranged around the heads 20 are aligned perforations through which extend rods 22,

" the ends of which are threaded and extend through the heads 20, such threaded ends being provided with nuts 23. The rods 22 and nuts 23 firmly hold the heads 20 onto the cylinder 21 as is obvious from an inspection of the drawings. The heads 20 are provided I with centrally arranged stuffing boxes 24 inner ends of the piston rods 26 and 27 screw into opposite sides of the central hub 29 formed on the piston 28. It is obvious from the above description that movement of the piston 28 from its position shown in Fig. 3

to the rightwill cause the piston 28 and piston rods 26 and 27 to move together as a unit. Formed on the outer faces of the heads 20 and concentric with the stufling boxes 24 and of suitable diameter are threaded portions 30 in each of which are screwed open ended cylinders 31 of considerably less diameter than the diameter of the cylinder 21. mounted a piston 32 secured on the piston rods 26 and 27 respectively by nuts 33. To facilitate assembling of the cylinders 31 in position in the threaded portions32, I find it. convenient to slot the outer ends of such pistons as indicated at 34. Formed at the upper end of each of the heads 20 is an internally. threaded flange 35 in each of which is screwed the lower end of a pipe 36, the upper end-of each of these pipes connecting with, in any convenient manner, the lower head of the drum 16. Formed in each of the heads 20 between the threadedjflange 35 and the threaded portion 30 is an enlargement 37 in which is formed a valve seat 38 and with which valve seat cooperates a valve 39, such valve being normally held against its seat by the tension of a spring 40 held in position by a cap 41. A passageway 42 extending from the valve 39- to the front of the stuffing box 25or the interior of the cylinder 31allows material that passes from the tank 16 through either of the pipes 36 and past the valve 39 to flow into either of the cylinders 31. It is obvious, however, that reverse movement of the material is prevented by the construction and operation of the valve 39, suflyvalve',

' therefore, operating as acheck valve to allow movement of material in one direction In each of the cylinders 31 is slidably only. On the central outer portion of each of the heads 20 is formed an enlargement 43 internally threaded to receive one end of a pipe 44. The internally threaded portion 43 communicates with the rear end of the cylinders 31. Referring now to Fig. 2, it will be seen that, to the outer end of each of the pipes 44 is attached an angle check valve 45, while each of the angle check valves 45 is connected to a T 46 by pipes 47. The T 46 is connected by valve 48 to one end of the flexible tube 19. The other end of this tube 19 is provided with a spring closed control valve 49 provided with a flexible nozzle 50.

The lower portions of each of the heads 20 are provided with perforations 51 and in each of such perforations is threaded a nipple 52. To each of the nipples 52 is connected a union 53 while to each of the unions 53 is connected one end of a pipe 54 which extend re-arwardly of the machine and are connected at their other ends to hydraulic cylinders 55. These hydraulic cylinders are secured to the longitudinally extending members 15 by means of bolts 56 or in any other desired manner. Secured to the two rearmost bolts 22 on the heads 20 are the downwardy extending ends of a U- shaped member 57, the cross portion of which lies parallel to, and at substantially the same height, as the top of the cylinder 21. Secured to the top surface of the cross portion of the U-shaped member 57 in any convenient manner, as by forging, welding, or by means of bolts, is a member 58 that is substantially U-shaped in cross section as clearly shown in Fig. 6. In one arm of the member 58 is secured by nut 59 a shaft 60 on which is rdtatably mounted a grooved pulley 61. The body of the grooved pulley 61 is provided with an arcuate slot 62 of suitable length and for a purpose to be hereinafter described. The other arm of the U- shaped member 58 is provided with a later ally extending bracket 63 to the top surface of which is secured by a bolt 64 a valve 65.

The left hand end of this valve 65, as viewed in Fig. 2, is connected by a plpe 66 to the left hand hydraulic tank 55 while the right hand end of such valve 65, as viewed in Fig. 2, is connected by pipe 67 to the right hand hydraulic tank 55. The upper end of the valve is connected by pipe 68 to any convenient source of air supply. This valve 65 is a four-way valve, it being possible by proper rotation of the valve plug to direct air into either the left hand hydraulic tank 55 of the right hand tank. The valve plug 69 of the valve 65 extends outwardly to a point within the hub of. the grooved pulley 61 and this extended portion has secured thereto one end of a crank arm 70 To the crank arm 70, and extending laterally outward therefrom, is a pin 71 whichworks in the arcuate slot 62 in the grooved pulley 61. Adjustably secured to one face of the grooved pulley 61 on the side of the center remote from the arcuate slot is a weight 72 which tends to rotate the grooved pulley 61 into such a position that x the weight 72 will occupy its lowermost position as shown, for example, in'Fig. 3. On the cross portion of the U-shaped member 57 and on each side of the member 58 is secured by bolt 73 buffer plates 74 and with which plates the weight 72 is adapted to engage.

Secured to the piston 28 within the cylinder 21 and extending outwardly through the heads '20 to any appropriate distance within the limits of the machine is a rod 75. The perforations in the heads 20 through which the rod 75 extends are provided with stufling boxes of the usual type in order to preventleakage. Secured to the rod 75 at each end thereof by means of nuts 76 are members 77, the upper end of each of which is provided. with a tubular member 78. lintermcdiat-e the ends of the members 77 and extending therebetween so as to lie parallel to the rod 75 is a rod 79 secured in posi-' tion by nuts 80. It is obvious that,-as the piston 28 is reciprocated in the cylinder 21, the rod 75 and, therefore, the frame comprised of the rods 7 5, 79, and member 77. will also be reciprocated. Numerals 81 and 82 designate flexible members, such as rope, one end of each of which is secured to the grooved pulley 61 and the other end of the member 81 passes through the tubular memher 7 8 on the left hand member '77, as viewed in Fig. 3, where its end'is knotted, as indicatedat 83', while the other member 82 has its end remote from the pulley 61 passing through the right hand tubular member 78 in the right hand member 77 where its end is knotted, as-indicated at 84. The members 81 and 82 are placed on the pulley 61 in such a manner that a pull on the left hand member 81 will cause an anti-clockwise rotation of the'pulley 61 while a corresponding pull on the right hand member 82 will cause a clockwise rotation of the pulley 61.

Assuming the apparatus to have been const'ructed and assembled as above described and that the piston 28 has been moved by means of fluid under pressure to the position shown in Fig. 3 and that, during this movement, any lubricant that may have been in the right hand cylinder 31 hasbeen forced outward through the tubular member 19, while simultaneously therewith the piston 82 in the left hand cylinder 31 has drawn from the drum 16 through the pipe 36 a quantity of lubricant sufficient to fill the left hand cylinder 31. The above operation is based on the assumption that air under pressure has been turned into the pipe 68 ,so that, when the p ston 28 has reached the point against the left hand face of the piston 28,

forcing the same to the right, as shown in Fig. 3, and ejecting the lubricant in the left hand cylinder 31 through the flexible tube 19 and also drawing in from the right hand pipe 36 a mass of lubricant from the drum 16. As the piston 28 moves to the ri ht, the framework comprised of the rods 75, 9, and member 77, moves also to the right and the flexible member 72 rotates the grooved pulley 61 in a clockwise direction, or in the direction of the arrow shown in Fig. 3. Durin this rotative movement ofthe grooved pulley 61, the weight 72 is raised upward and onward until it is beyond the vertical point, as indicated in dotted lines, when such weight will cause a quick rotative movement in a clockwise direction of the pulley 6'1 untll such weight engages with the right hand buffer plate 74:. I In this quick rotative movement, the end of the arcuate slot 62 will engage with the pin 71 on the member and will move the same sharply to the left of the vertical line or until such pin occupies a position to the left of the vertical line corresponding to its position as shown in Fig. 3 and this movement imparts a hammer blow to the plug 69 which thereupon reverses the direction of flow of the air through the pipe 68. This operation will continue until air is shut ofi' from the pipe 68. ile l have necessarily shown and described the preferred embodiment of my invention somewhat in detail, it is to be understood that It tion of a source of supply, a plurality of measuring means adapted to be alternately connected therewith, operating means connected to said measurin means, a plurality of hydraulic pressure evices connected to said operating means, a common source of fluid under pressure for said hydraulic pres sure devices, and means operable by the operating means for connecting the fluid under pressure alternately to the plurality of hydraulic pressure devices.

2. In a power rease pump, the combination of a source 0 grease supply, a plurality of measuring devices adapted to be alternately connected to the source of grease supply, an hydraulic engine for operatin said grease measuring devices, a plurality of hydraulic pressure devices connected to said hydraulic engine, a source of fluid under pressure, and means operated by the hydraulic engine for alternately connecting the source of fluid under pressure to the hydraulic devices.

3. In a power grease pump, the combina tion of a cylinder, a piston reciprocating therein, a piston rod connected to, and extending outward from, each end thereof, a piston connected to the outer ends of each of the piston rods, a cylinder in which each of the latter pistons works, said cylinders being secured to, and extending outward from, each end of the first said cylinder, a palr of hydraulic pressure devices connected one to each end of the first said cylinder, a common source of fluid under pressure connected to said pair of hydraulic pressure devices, a valve interposed between the source of fluid under pressure and the hydraulic pressure devices, means operable by the first said piston for controlling said valve to alternately connect the common source of fluid under pressure to the hydraulic pressure devices, and means associated with said valve to impart a hammer blow thereto at each end of the stroke of the first said piston.

In testimony whereof, I have signed my name to this specification.

J McELROY SMITH. 

